Rompers are popping up everywhere lately from street style to the red carpet (case in point: Kristen Stewart's recent getup). And rightfully so, "they're one of the most versatile pieces a woman can own," says designer Rachel Roy. Plus, since they're literally a one-piece, you won't find yourself taking forever to get ready, putting together multiple separates—just throw that baby on and go.

"In the summer, rompers might not need anything else beyond stacked bracelets and a pair of great heels, but as it gets colder out, they can be layered with a motorcycle jacket, tights (if your romper exposes your legs), and low-rise biker boots for a really cute and comfortable look," says Roy. "If you're wearing one to the office, pair it with a simple structured blazer that will make it seem chic and professional."

The only thing she recommends to avoid wearing with a romper is a pair of thigh-high boots—hello, Pretty Woman!